Watchmen was created by writer Alan Moore, artist Dave Gibbons, and colourist John Higgins. Moore used the story as a means to reflect contemporary anxieties and to critique the superhero concept. Watchmen depicts an alternate history where superheroes emerged in the 1940s and 1960s, helping the United States to win the Vietnam War. The country is edging towards a nuclear war with the Soviet Union, freelance costumed vigilantes have been outlawed and most costumed superheroes are in retirement or working for the government. The story focuses on the personal development and struggles of the protagonists as an investigation into the murder of a government sponsored superhero pulls them out of retirement, and eventually leads them to confront a plot that would stave off nuclear war by killing millions of people.